CN102018555B - Clamping device easy to clean - Google Patents
Clamping device easy to clean Download PDFInfo
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- CN102018555B CN102018555B CN201010280659.9A CN201010280659A CN102018555B CN 102018555 B CN102018555 B CN 102018555B CN 201010280659 A CN201010280659 A CN 201010280659A CN 102018555 B CN102018555 B CN 102018555B
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- jaw
- locking
- head
- diameter
- clamping device
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- 230000003670 easy-to-clean Effects 0.000 title claims abstract description 5
- 230000009471 action Effects 0.000 claims abstract description 4
- 230000000712 assembly Effects 0.000 claims description 9
- 238000000429 assembly Methods 0.000 claims description 9
- 230000004888 barrier function Effects 0.000 claims description 7
- 210000000988 bone and bone Anatomy 0.000 claims description 2
- 239000012634 fragment Substances 0.000 claims description 2
- 210000003128 head Anatomy 0.000 description 36
- 210000001331 nose Anatomy 0.000 description 14
- 238000012856 packing Methods 0.000 description 12
- 238000004140 cleaning Methods 0.000 description 5
- 238000004659 sterilization and disinfection Methods 0.000 description 4
- 210000003813 thumb Anatomy 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
- A61B17/64—Devices extending alongside the bones to be positioned
- A61B17/6466—Devices extending alongside the bones to be positioned with pin-clamps movable along a solid connecting rod
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2/00—Friction-grip releasable fastenings
- F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
- F16B2/06—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action
- F16B2/12—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action using sliding jaws
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
- F16B7/04—Clamping or clipping connections
- F16B7/0433—Clamping or clipping connections for rods or tubes being in parallel relationship
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Surgery (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
- Clamps And Clips (AREA)
Abstract
A kind of clamping device easy to clean (10), this clamping device comprises at least one clamp assembly (20,30), described clamp assembly (20,30) there are two jaws (11,12 providing at least one acceptance division (71); , thus hold the clamped element along the longitudinal axis of described acceptance division (71) 13,14).Be provided with locking unit (40) and close described jaw (11,12 to allow to resist the power of spring element (15); 13,14), described locking unit (40) comprises along axis (46) and passes described jaw (11,12; 13,14) axle (44) that hole (21,22,23,24) extends and the head (42) for operating the pinching action be resisted against on topmost jaw (11).The locking element (50) with through hole is set, and described locking element (50) can be arranged between described head (42) and described topmost jaw (11), wherein, the diameter of a part (51) of described locking unit (40) is greater than the hole (22) of the second jaw (12), and the diameter of the head of described locking unit (40) is less than the hole (21) of described topmost jaw (11).Described locking element (50) comprises at least one locking surface (52), described locking surface can form form fit formula locking with the corresponding surface of described head (42), to stop removing of described locking element (50).
Description
Technical field
The present invention relates to a kind of clamping device easy to clean, more specifically, relate to a kind of being used in external fixation system to keep the stationary fixture of bone fragments adjacent one another are.
Background technology
US 5,242,240 relates to a kind of clamping device for surgical retractors, and relates to cleaning and disinfection problem.Refer to when this device loss of parts or dislocation time there will be problem, therefore this clamping device combination has setting element, so that this device is even also maintained complete assembled state when carrying out clean operation.
EP 0 972 491 relates to a kind of fixture, and it uses lever, and this lever opens clamping jaw along the axle allowing jaw to open.This be a kind of allow to clean better between jaw parts and the scheme of device feature can not be lost.But described clamping device is quite simple.
And as shown in WO 2005/096966, further prior art literature recommendation, for the device of complexity, is preferably and allows disassembled simply to carry out cleaning and disinfection.According to the document, an industrial object provides relative existing apparatus to have the new device of less parts, makes simple operations and clean more easily to realize.
But novel clamp, the novel clamp in particular for external fixation system designed to be used improvement and handles therefore more complicated, thus dismounting is not a kind of scheme.
Summary of the invention
Therefore, the object of the invention is the cleaning and disinfection problem overcoming prior-art devices, and for professional provides a kind of clamping device be especially used in external fixation system, this clamping device can easily clean and sterilize and there is not the vitals of losing device or the risk of spended time owing to re-assemblying.Inventor notices, this kind of clamping device comprises central shaft, is furnished with clamping jaw around this central shaft.These elements are the expensive items of device together with central spring.But, this structure make its to be difficult to two jaws of a clamp assembly between space clean, and when two clamp assemblies, also be difficult to clean, especially for spring element the space between a jaw and another jaw of same components and between central shaft and different gripper jaw part.
This device is realized by fixture according to the present invention.
The present invention is based on such understanding, except the above-mentioned vitals of fixture, a lock portion can be set thus allow the simple parts extracting jaw out.Which avoid the risk of vitals of losing device, but allow remainder to launch along central shaft, namely allow to enter into the spring element and one or more residue gripper jaw part that can realize clamping function.
Usually, this clamping device for external fixation device has multiple different size.Due to only therefrom a gripping portions can be taken away by spindle unit, therefore which avoid the mixing of different device parts.Especially advantageously, for multiple clamping device, locking element can be identical, and they are easily replaced in the present invention.In addition, owing to preferably using locking element with a modular size or a little several modular size, if a loss in the parts that therefore these sizes are less, then it is easy to replace and replace with least cost.
Provide further embodiment of the present invention in this application.
Accompanying drawing explanation
Hereinafter be described the preferred embodiment of the present invention with reference to accompanying drawing, these preferred implementations are for illustration of the preferred embodiment of the present invention but not for limiting the present invention.In the drawing:
Fig. 1 shows the exploded view of the first embodiment of fixture of the present invention;
Fig. 2 shows the axonometric chart of fixture shown in Fig. 1;
Fig. 3 shows the sectional view of fixture shown in Fig. 1;
Fig. 4 shows the top view of fixture shown in Fig. 1;
Fig. 5 shows the axonometric chart of the axle of fixture shown in Fig. 1;
Fig. 6 shows the face upwarding stereogram of the locking element of fixture shown in Fig. 1;
Fig. 7 shows the top perspective view of locking element shown in Fig. 6;
Fig. 8 shows the sectional view of locking element shown in Fig. 6 of being combined with packing ring;
Fig. 9 shows the sectional view of the second embodiment of fixture of the present invention;
Figure 10 shows the top perspective view of the locking element of fixture shown in Fig. 9; And
Figure 11 shows the axonometric chart of the 3rd embodiment of fixture of the present invention.
Detailed description of the invention
Fig. 1 shows the three-dimensional exploded view of preferably the first embodiment according to fixture 10 of the present invention.Fixture 10 comprises the first clamp assembly 20, second clamp assembly 30 and central shaft 40, and described central shaft 40 is located along the longitudinal axis 46 of axle 40 through the hole 21,22,31 and 32 in two clamp assemblies 20 and 30.More for joint figure makes an explanation by the specific features in hole 21 and 22.
Axle 40 is preferably the locking unit being suitable for clamp assembly 20 and 30 can be closed.Axle 40 enters the first jaw 11 through locking element 50 and packing ring 41.Axle 40 comprises head 42, proximal portion 43 and is followed by the reduced diameter portion 44 of threaded portion 49.External thread part 49 is suitable for screwing in the complementary inner thread in distally jaw 14, make the head 42 of turning cylinder 40 can change the lengthwise position of axle 40 relative to jaw 11,12,13 and 14, thus allow the power relative to the spring 15 be arranged between two clamp assemblies 20 and 30 and open or closed whole fixture 10.Described spring 15 is preferably positioned in acceptance division 23 corresponding in jaw 12 and 13.Except the spring 15 arranged around axle 40, can also arrange as Belleville washer or the different spring element such as resiliency compressible solid or foam.After closed clamp assembly 20 and 30, the jaw adjacent with spring 15 can finally contact, and then, the angle of each clamp assembly 20 and 30 relative to another is fixed on the anti-rotation surface 45 be arranged in two surfaces of jaw 12 and 13.
It should be noted that, simple fixture according to the present invention only comprises a clamp assembly 20 with two jaws 11 and 12, and together with spring element 15, central shaft 40 and certain locking element 50, its function will be described hereinafter.Spring element 15 preferably but be not positioned necessarily between two clamp assemblies 20 and 30.It also can be arranged between lower jaw 13 and 14.Spring 15 is not important away from the second jaw 12.
In embodiment illustrated in the accompanying drawings, after the axle 40 with screw thread 49 is installed in jaw 14, end that extend in the distal end 47 (see Fig. 3) of jaw 14, screw thread 49 is destroyed by pressure, thus ensures that axle 40 can not remove from clamp assembly 20 and 30.This makes it possible to fixture 10 to be maintained one single.Stop nut or nut/counter nut's combination also can be set in described distal end and recess 47 on screw thread 49.
Each clamp assembly 20 or 30 comprises two relative paired jaws 11,12 and 13,14 respectively.These jaws are nearby shaped towards basic simlarity on sidepiece each other at pin 19, and described pin extends in corresponding hole 18.This pin-and-hole connection along longitudinal axis 46 orientation of clamping device 10 is the anti-rotation device for jaw 11,12 and 13,14, makes these jaws of a centering can not change their mutual angle.Pin 19 or hole 18 can but not necessarily collecting make pin 19 can the elasticity assembly parts of resilient movement.
Towards jaw 12 or 13 plane surface, the plane surface of jaw 11 or 14 is provided with three distance pieces 17, described three distance pieces 17 are arranged in the turning on described surface.Distance piece 17 has general triangular form, and it highly makes the inverse supporting explained hereinafter play a role.In addition, distance piece 17 enables two plane surfaces of jaw 11,12 or 13,14 be spaced from each other a distance, and makes it possible to clean cavity 66 between the jaw between these surfaces more easily.
Herein, jaw is provided with three grooves 61,62 and 63.Groove 61,62 and 63 is all arranged at the same level of the longitudinal axis orthogonal of axle 40.In this plane, described three grooves are orientated vertical with the radial direction at center, hole 21,22,31 or 32.
When the clamp is closed, each pair of groove 61,62 or 63 in each jaw respectively defines the acceptance division being formed as the circular hemispherical recesses in cross section, thus provides acceptance division 71,72 and 73 (see Fig. 2) to allow to hold the cylindrical pin or bar and fastening described cylindrical pin or bar that have and limit diameter.In the illustrated embodiment, three grooves 61,62 and 63 all have different size, make corresponding acceptance division 71,72 and 73 have three kinds of different sizes.In other words, each acceptance division 71,72 or 73 is suitable for receiving different retaining element, namely has the bar of different-diameter, screw, pin or line.A kind of preferred implementation of the first clamp assembly 20 has to receive the groove that diameter is respectively the retaining element of 12mm, 8mm and 5mm.Different embodiment can have the sequence that diameter is respectively 8mm, 6mm and 4mm.
The second clamp assembly 30 according to the embodiment of Fig. 1 also comprises two jaw portions 13 and 14, and these jaw portions comprise three grooves 61,62 and 63.
Certainly, clamp assembly 20 and 30 also can be the traditional clamp assembly as shown in EP 0700664, and this clamp assembly has an acceptance division for each pair of jaw.As mentioned above, also principle of the present invention can be applied to such device, this device only has a pair jaw, and it is for a single bar, and other functional part.
Fig. 2 shows the axonometric chart of the fixture according to Fig. 1.In whole accompanying drawing and all different embodiments, same or analogous feature is marked by identical Reference numeral.
Except the different parts shown in Fig. 1, the assembling fixture shown in Fig. 2 clearly show cavity 65 between the clamp assembly between two pairs of jaws and cavity 66 between the jaw that limited by distance piece 17.These cavitys 65 and 66 have been difficult to clean, for spring 15 the acceptance division 23 be hidden and especially hole 21,22,31 and 32 be also like this, because the spring action when the end of thread 49 of axle 40 and owing to pressing against the jaw 11 on the head 42 of axle, described hole has been hermetic.In embodiments, between head 42 and jaw 11, packing ring 41 and locking element 50 is provided with.
Fig. 3 shows the sectional view of the fixture according to Fig. 1, and wherein, fixture 10 is depicted as and is in pre-mounted state, under namely spring 15 is in tensioning.Therefore, rounded washers 41 presses against on the downside of locking element 50 by the upper gripper jaw 11 of the first clamp assembly 20, described locking element 50 and then press against with the surface of its locking acceptance division 52 on the downside of the locking nose 51 in the head 42 of axle 40.Jaw 11 has circular depressions 24 to hold packing ring 41 around the proximal end place in its hole 21.This makes upper gripper jaw 11 can move pivotally relative to the axis 46 of axle 40, because axle 40 is included in the reduced diameter portion 44 that the whole length of jaw 11,12 in two assemblies 20 and 30 and preferably jaw 13,14 extends.Also can be very close to each other between axle 40 and jaw 12; Hole 22 only allows with more preferred gaps and is introduced by axle 40.So jaw 12 only can carry out translational motion along axis 46.
Axle 40 as a part for locking element screws in the lower distal jaw 14 of the second clamp assembly 30, and screw thread 49 is destroyed.Different possible schemes uses counter nut, thus avoid axle 40 to extract out.Therefore, by the head 42 of turning cylinder 40 and then rotate have in jaw screw thread stop feature (end that screw thread is destroyed or use counter nut) described axle 40 and can open and close two clamp assemblies 20 and 30.
Axle 40 also can be replaced by the single screw of the lower jaw 14 of screw-in second clamp assembly 30 with the combination of counter nut.In hole, screw thread can be set or described screw can have self-tapping screw thread.Quite normally, can arrange locking unit, this locking unit can be lever lock stop element or bayonet type locking piece (bayonet lock).In these locking units, can select supporting disk or band fluted disc, for the object of simplicity, they do not illustrate in the accompanying drawings.
Obviously, use the reach of maximum possible to extract axle 40 out along axis 46 and can not provide real void space for cavity 65 and 66.
Fig. 4 shows the top view of fixture according to 1.Embodiment due to Fig. 1 comprises three grooves 61,62 and 63, is therefore provided with three sidewalls for jaw 11, when overlooking as shown in Figure 4, this provides the triangular shaped of each clamp assembly 20 or 30.
Fig. 5 shows the axonometric chart of the axle 40 according to the fixture of Fig. 1.Except in conjunction with the feature mentioned by other accompanying drawing, the proximal region 43 of axle 40 is also attractive.This proximal region comprises locking nose 51 relative in two diametric(al)s, and described locking nose extends beyond diameter and reduces axle portion 44.Described in these, locking element 51 is nearby provided with circular depressions 55.As seen from Fig. 5, these recesses 55 make little transition portion 56 substantially can not extend beyond the reduced diameter portion 44 of axle 40.In addition, the flat side surface 48 as the head 42 of corner axle flushes with corresponding transition portion 56.
Fig. 6 shows according to the locking element 50 of the fixture 10 of Fig. 1 together with the face upwarding stereogram at the packing ring 41 hereafter made an explanation.Fig. 7 shows the top perspective view of the locking element according to Fig. 6.Fig. 8 shows the sectional view of the locking element according to Fig. 6 be combined with described packing ring 41.
Locking element 50 comprises thumb wheel 53, easily to rotate described element 50 around the axis 46 of axle.Locking element 50 has the throughbore 54 being provided with specific dimensions.Described throughbore 54 by parallel to the axis 46 surface 57 define on the opposite sides, wherein, in a top view, described in define be the string of annulus.
Described surperficial 57 are spaced from each other a distance, thus allow the flat head portion surface 48 of the head 42 of axle 40 to pass through.In a top view, the other side surface 59 of throughbore 54 is circular arc.These arrange and allow the circular surface 58 namely comprising locking nose of corner head 42 to pass through.Other side surface 59 defines by allowing cavity.
The downside of locking element 50 comprises flange 74, thus allows the inner periphery locking flange of the correspondence of packing ring 41 to introduce.Packing ring 41 also can be incorporated in locking element 50.Packing ring 41 arranges sloping supporting surface 75 in downside, for the non-translational motion of upper gripper jaw 11.
Locking element 50 allows to rotate around the longitudinal axis 46 of device together with the circular form of packing ring 41.In this rotation, some positions have specific function.Locking element 50 can be located in the position shown in the figure 1, and in this position, the locking nose 51 of the head 42 of axle 40 is placed in the locking acceptance division 52 of element 50.Owing to being provided with relative nose and acceptance division in two diametric(al)s, therefore by described element rotation 180 ° being reached two identical positions.If be only provided with in other embodiments a nose-acceptance division to or three nose-acceptance divisions to (being such as in the angle of 120 degree), same function can be obtained.
Be called this or these in position of lock position, the head 42 of axle 40 is in its cross section not by the position of the throughbore 54 of locking element.Obtain the axle of the clamping function considering explained device above and the latch functions of screw.As in traditional clamping device, rotation head 42 and opening or closed set of jaws 11,12 and 13,14.Because locking element 50 and head 42 are in form fit formula locking (positive locking), therefore element 50 rotates together with axle 40.
Be provided with one or more diverse location being called open position, in this position, the head 42 of axle 40 is in its cross section can by the position of the throughbore 54 of locking element.The planar side 48 of head 42 passes through near surface 57, and rounded nose surface 58 is passed through near arc-shaped surface 59.Eliminate the axle of the clamping function considering device and the latch functions of screw.Therefore, it is possible to remove locking element 50.Utilize a nose-acceptance division to or such as three nose-acceptance divisions to also obtaining described result.Certainly, right being arranged symmetrically with of these nose-acceptance divisions is preferred, to avoid the torsional moment acted on element.
Locking element 50 comprises the height of restriction, and described height is especially visible in the sidewall 64 of locking acceptance division 52.Therefore, locking element 50 can not rotate into and make locking element 50 self-closing position move to open position, but is provided with the actuating height provided by described sidewall 64.It should be noted that, spring 15 is from being pushed by locking element below on the locking nose 51 of head 42.The removing of locking element 50 needs the screw of loosening axle 40 to obtain the space of the translational motion for locking element 50 and jaw 11 and 12.Then, locking element 50 can press down along axis 46, maintains the head of axle 40 simultaneously.Then, the locking nose 51 of head departs from the locking acceptance division 52 limited by its sidewall 64, and once nose 51 is thrown off, then thumb wheel 53 can be used for rotary locking element 50, simultaneously locking nose 51 locking element 50 immerse oneself in slide in surface 67.After 90-degree rotation, surface 48 and 57 and 58 and 59 alignment, and locking element 50 can be removed along axis 46.
Locking element 50 this removes and allows the described device of process further, as composition graphs 3 explain.The parts adjacent with locking element 50 of the jaw 11 of topmost or in different embodiments clamping device 10 comprise the through hole 21 of the axle 40 holding clamping device, and the maximum gauge of the head 42 of the straight diameter ratio shaft 40 of described through hole 21 is large.This permission removes the first jaw 11 completely from the axis of axle.The maximum gauge of the head 42 of the straight diameter ratio shaft 40 in the hole 22 of the second jaw 12 is little.Therefore, after removing the first jaw, the second jaw 12 pressed against on head 42 by spring 15 is retained on the axle 46 of clamping device 10.But, can clean cavity between cavity between clamp assembly 65 and jaw 66 (between jaw 13 and 14) now, and easily arrive the reception space of spring.This partial dismantling makes it possible to more easily carry out cleaning and disinfection.
It should be noted that, although the diameter reducing the so-called reduced diameter portion 44 of axle 40 is over the whole length preferred, this is not necessary.Will need to reduce diameter and need to reduce diameter in the region that locking element 50 will be placed in the region of movement after the first jaw 11 removes at the second jaw 12.But, the location place setting example that just can exceed the circular depressions 24 of locking element place and the first jaw on axle 40 as rib, for stablizing the complete translational motion of described first jaw 11, although this is not preferred usually.Namely jaw 12 and 13 and spring 15 can be arranged on axle 42 through threaded portion 49 from its far-end, the diameter of described threaded portion than the hole of jaw 12 and 13 and the inner opening of spring 15 little.
Fig. 9 shows the sectional view of the second embodiment 100 of fixture of the present invention.Description below only relates to this fixture 100 feature different from fixture 10.Further feature is identical with the character pair of fixture 10 and be marked by identical Reference numeral.Figure 10 shows the top perspective view of the locking element 150 according to the fixture of Fig. 9.
The jaw 11 of fixture 100 has the endoporus 21 for holding axle 40, and the diameter in this hole 21 is greater than the diameter in the hole 22 of jaw 12 as in the first embodiment.In the illustrated embodiment, axle 40 comprises flange 151, and the diameter of this flange 151 is greater than the diameter of reduced diameter portion 44, thus allows jaw 11 via hole 21 by still stopping jaw 12.The head 42 of axle 40 has diameter similar, but this not necessarily.As will be hereafter made an explanation, depend on the diameter of proximal portion 143 that combine with locking element 150, axle 40, head 42 also can have much smaller diameter.
Locking element 150 is not closed loop but comprises side opening 159.The internal diameter of ring defines interior annular surface 157 so that limited hole.The distance of the side surface 154 of opening 159 is less than the diameter of through hole, and especially, side surface 154 distance is to each other less than the diameter of axle 40.This allows axle 40 can snap in place.The downside 141 of locking element 150 is associated with the inclined surface of the packing ring 41 of the first embodiment.Interior annular surface 157 stops in locking rim 152 adjacent place, thus defines the ledge surface of locking element 150, is pushed on the downside of head 42 via jaw 12 and 11 with the effect by spring 15.When locking element is in place, this makes clamping device locking.In order to remove jaw 11, locking element 150 must be removed in advance as in the first embodiment.
Due to by the downside of it 141 around the open side 159 of element 150 also maintained by jaw 11, therefore can not directly remove locking element 150.Therefore, screw 40 must be loosened to allow to be pushed away by jaw 11 from locking element.In addition, locking rim 152 is adjacent with sidewall 164, makes to need equally to loosen screw for this additional height, because do not allow laterally to release from the bottom 251 of locking element 150 by head 42 as the stop surface 165 of a part for side surface 154.
It should be noted that, the part 51 or 251 of head 42 or to separate with transitional region 143 and the diameter exceeding the part 151 of transitional region 143 is greater than the hole 22 of the second jaw, wherein, when the diameter of transitional region 143 is larger, then head 42 can have more minor diameter, as long as allow the stop nose 51 of head 42 or flange 251 to be engaged by abutment surface 52 or 152 respectively.
Figure 11 shows the axonometric chart of the 3rd embodiment 110 of fixture of the present invention.First clamp assembly 10 of this clamping device 110 and the second assembly 20 are such as identical with the corresponding clamp assembly of the embodiment of Fig. 1.If the diameter holding the hole of axle 40 is different from the embodiment of Fig. 1, be then another alternative embodiment.Hole 22 in jaw 12 and the hole 31 in jaw 13 can have similar large diameter to the hole 21 in jaw 11.When the maximum gauge of the head 42 of the straight diameter ratio shaft 40 in hole 22 and 31 is large, also the second jaw 12 and the 3rd jaw 13 can be extracted out from the axis of axle.
Additional stop instrument is comprised according to the embodiment of Figure 11.Figure 11 shows and the described stop instrument 300 be combined according to clamp assembly of the present invention and device as above.The head 42 of screw 40 comprises the threaded inner opening 301 of tool, and the external screw thread of stop instrument 300 can be fixed in described inner opening.Also will it is possible that barrier element 300 be sandwiched on head 42 or comprises bayonet couplings.Stop instrument 300 also comprises the axle 302 adjacent with external screw thread 301 and is positioned at the stop flange 303 of another free end.The diameter of axle 302 is preferably less than or equal to the diameter of reduced diameter portion 44.Then, the diameter of stop flange 303 is greater than the through hole 54 of locking element and the corresponding aperture 21 of jaw 11.Then, before cleaning, screw 40 can be made to loosen and as the preparation removing locking element 50 and the first jaw 11, be then fixed on by stop instrument 300 on the head of screw 40, finally locking element 50 and the first jaw 11 are extracted out as explained above on axle.But these elements are blocked on the extension axis 46 of screw now, therefore, it is possible to easily clean described element and described first jaw can not be lost.Have in the above-mentioned embodiment in larger diameter cross section in hole 22 and 31, so, all jaws 11,12,13 and spring 15 and barrier element 50 can be axle 40 add the summation of axle 302 major axis on clean.In this embodiment, locking unit can be considered as comprising screw 40 and locking unit 300.
Locking unit 40 is described as having axle 44, and described axle 44 can screw thus cause the stop member 42 and 43 of locking unit 40 to move along axis 46.But stop member 42 or 43 also can comprise the flange in the abutment surface acting on upper gripper jaw 11, and described flange is by the lever as locking unit.
The setting of the height of the restriction of side surface 64 or 164 ensure that in the pre-clamped position of clamping device 10, but namely pressing against on jaw 11 at spring 15 and locking element 50 is remained in place itself does not have in the position of pinching action, and locking element 50 is not easy to lose or displacement.
As shown in drawings, word " diameter in hole 21 and 22 " is usually directed to cylinder-shaped hole, and word " diameter of head 42 " or " diameter of locking unit 40 " are usually directed to the diameter of cylinder-type lock stop element, but also relate to maximum gauge under non-cylindrical cell cases.Certainly, non-cylindrical oblique crank Z can also be set.In this case, " larger " means the orientation that the hole of the corresponding jaw of the permission that there is non-cylindrical oblique crank Z is passed through, and " less " means to there is not this orientation.Certainly, locking element 50 always has form fit formula locking feature, thus allows element 50 to pass through through head after suitably rotating.
List of numerals
10 fixture 42 heads
11 first jaw 43 proximal portion
12 second jaw 44 reduced diameter portion
13 distally jaw 45 anti-rotation surfaces
14 distally jaw 46 longitudinal axis
15 spring element 47 far-ends
17 distance piece 48 flat head portion surfaces
18 threaded portion, holes 49
19 pin 50 locking elements
20 first clamp assembly 51 locking noses
21 add macropore 52 locking acceptance division
22 blocking aperture 53 thumb wheels
23 acceptance division 54 throughbore
24 circular depressions 55 circular depressions
30 second clamp assembly 56 transition portions
31 string surface, holes 57
32 rounded nose surface, holes 58
40 central shaft 59 arc-shaped surface
41 packing ring 61 grooves
63 groove 164 sidewalls
64 sidewall 165 stop surfaces
The bottom of cavity 251 head between 65 clamp assemblies
Between 66 jaws, cavity 300 stops instrument
67 immerse oneself in surface 310 300 external screw thread
The axle of 71 acceptance divisions 302 300
The flange of 72 acceptance divisions 303 300
73 acceptance divisions
74 flanges
75 area supporteds
100 fixtures
110 fixtures
On the downside of in the of 141
143 proximal portion
150 locking elements
151 flanges
152 locking rims
154 side surfaces
157 Inner arc
159 side openings
Claims (8)
1. a clamping device (10 easy to clean, 100, 110), described clamping device is used in external fixation system to keep bone fragments adjacent one another are by means of retaining element, described clamping device comprises two clamp assemblies (20, 30), wherein, first clamp assembly has two jaws (11 providing at least one acceptance division (71), 12) thus hold the clamped element along the longitudinal axis of this acceptance division (71), wherein, second clamp assembly has two jaws (13 providing at least one acceptance division (71), 14) thus hold the clamped element along the longitudinal axis of this acceptance division (71), wherein, be provided with locking unit (40, 300) described jaw (11 is closed to allow the power of opposing spring element (15), 12, 13,14), described locking unit (40,300) comprises the axis (46) along described clamping device and passes described jaw (11,12,13,14) hole (21,22,23,24) axle (44) extended and the head (42) for operating the pinching action be resisted against on topmost jaw (11), wherein, arrange and have through hole (54, 157, 159) locking element (50, 150), and described locking element (50, 150) can be arranged between described head (42) and described topmost jaw (11), wherein, described locking unit (40, 300) a part (51, 151) there is the diameter that the diameter in the hole (22) of the second jaw (12) than described first clamp assembly (20) is larger, and the diameter of described head (42) is less than the diameter in the described topmost jaw i.e. hole (21) of the first jaw (11) of at least described first clamp assembly (20), wherein, described locking element (50, 150) at least one locking surface (52 is comprised, 152), described locking surface can form form fit formula locking with the corresponding surface of described head (42), to stop described locking element (50, 150) remove, wherein, described head (42) comprises above-mentioned part (51, 151), this part has the described larger diameter of the diameter in the hole (22) being greater than described second jaw (12), it is characterized in that, each jaw (11,12 in described two clamp assemblies (20,30), 13,14) be separated from each other, and, the shape of described head (42) and described locking element (50, 150) through hole (54, 157,159) profile design is for making at the described locking element (50 of permission, 150) cross section of head (42) described at least one position removed can pass through described locking element (50, 150) through hole (54).
2. clamping device (10 as claimed in claim 1; 100), wherein, substitute described head (42) and comprise above-mentioned part (51; 151) scheme, described locking unit (40) comprises and to separate with described head (42) and to exceed the above-mentioned part (151) of described head (42), this part has the described larger diameter of the diameter in the hole (22) being greater than described second jaw (12), wherein, the diameter of described head (42) is less than the diameter in the hole (22) of described second jaw (12).
3. clamping device (10 as claimed in claim 1; 100), wherein, at least one locking surface (52 described; 152) adjacent sidewall (64 is comprised; 164), described adjacent sidewall be parallel to described clamping device axis (46) and be provided for removing described form fit formula locking actuating height.
4. as claimed any one in claims 1 to 3 clamping device (10), wherein, at least one locking surface (52) described comprises angular interval to be two locking surfaces of 180 degree or angular interval be three locking surfaces of 120 degree.
5. clamping device (10) as claimed in claim 4, wherein, described locking element (50) comprise angular interval be 180 degree two by allow surface (59) or angular interval be three of 120 degree by allowing surface (59).
6. clamping device (100) as claimed in claim 1 or 2, wherein, described locking element (150) comprises side opening (159), and, described locking surface (152) comprises annular locking rim (152), and adjacent sidewall (164), to be provided for the actuating height removing described form fit formula locking.
7. clamping device (100) as claimed in claim 6, wherein, described side opening (159) comprises parallel side wall (154), and described parallel side wall limits the oral area of described side opening and described parallel side wall distance is to each other less than the diameter of the axle (44) of described locking unit.
8. clamping device (110) as claimed any one in claims 1 to 3, wherein, described locking unit (40, 300) comprise the actuator screw (40) be made up of the axle of described locking unit and head and comprise barrier element (300), wherein, described actuator screw (40) comprises the connection joining part at the junction surface (301) for the correspondence of described barrier element (300), wherein, described barrier element (300) comprises axle (302), the axle (302) of described barrier element (300) is adapted to be mounted to the prolongation of the axle of described locking unit (40), and described barrier element (300) comprises flange (303), described flange has and is greater than described clamp assembly (20, 30) the described larger diameter of the diameter in the hole (22) of the second jaw (12).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP09170105.2 | 2009-09-11 | ||
| EP09170105.2A EP2294995B1 (en) | 2009-09-11 | 2009-09-11 | Easy to clean clamping device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102018555A CN102018555A (en) | 2011-04-20 |
| CN102018555B true CN102018555B (en) | 2015-09-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010280659.9A Active CN102018555B (en) | 2009-09-11 | 2010-09-10 | Clamping device easy to clean |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US8657819B2 (en) |
| EP (1) | EP2294995B1 (en) |
| JP (1) | JP5624411B2 (en) |
| CN (1) | CN102018555B (en) |
| AU (1) | AU2010214716B2 (en) |
| CA (1) | CA2714193C (en) |
| ES (1) | ES2667759T3 (en) |
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2010
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Also Published As
| Publication number | Publication date |
|---|---|
| CN102018555A (en) | 2011-04-20 |
| EP2294995A1 (en) | 2011-03-16 |
| AU2010214716A1 (en) | 2011-03-31 |
| US20110087226A1 (en) | 2011-04-14 |
| JP2011067622A (en) | 2011-04-07 |
| CA2714193A1 (en) | 2011-03-11 |
| EP2294995B1 (en) | 2018-04-04 |
| ES2667759T3 (en) | 2018-05-14 |
| JP5624411B2 (en) | 2014-11-12 |
| CA2714193C (en) | 2017-03-07 |
| AU2010214716B2 (en) | 2015-04-23 |
| US8657819B2 (en) | 2014-02-25 |
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